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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '049f7b42244129667b765341599253c7a26f5fa1153a3d9ea49338899991cb3d' 
  AND token = '0n0uF/OZCxgAuiRGp9Tt8zh1sIw3M0f8EjGJigux69I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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