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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9c65ff75332edd21b9c0d7438b876fee40dc7c7916ce26b392c75b16fa5e40a3' 
  AND token = 'e1YPInJTg3SBJedU4FBepI18/3D4v/CJOmS1AqYYeLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}