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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f081cbd525576621365d5f87a42ad1318d53082e2c35ca8ea97813e05f01b3e0' 
  AND token = 'WPSGP6gLI+5l5Kqa96ruI9NU5R7xdw2sj5I6TA8I5go=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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