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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fed8051cd205c99d5d2087d76eabf294d0fe7c78be2f6a7c7b656ed31be8b647' 
  AND token = 'CMSwXpEwLYCb/BS5lORdffnFil6Ig4li6OEcoFcMtLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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