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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1ccb1f07a9dc6ddbc3f0b6391d3f0ca62111baa4cfebd222bc76c83097d9c58' 
  AND token = 'pJJv8ogxSYm8Oga9K/m7v+4RXmtXKTHSkL6D/lG9u/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}