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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '113edd58c6803a6d908d61dae770fadbcf72aa4237a8985a4f2e4c9e3c69d487' 
  AND token = 'qN7fsT3EpWKsgc9Xx3+MldnIF4cCfptEOORWrPJSGm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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