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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66e13ccf9164107525e70c3994f5644373022b58730303da41a456b69ad3cc1b' 
  AND token = '5VYeIfNrCEhuEOd9+PUJsMJ+yBmmEJ5U0Y4RCNp9jtU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00170

JSON explain

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