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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7307f0d0839d4efbfdae68f995081bd65db68c662e21ea8966037827a59c3f9c' 
  AND token = 'bGJ5mIXb5Ycvel9lPoz7WwkOlqN7pb7pAkV0u+5Xc9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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