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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e99e4cb7f3ee0613ad41d104cbb45189f177be0717c6727d48755df853c201a5' 
  AND token = 'bfIJHxZETSj6yGT9eaHmPSpbr/1Rdf6z9X4ICvn5Ogw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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