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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c72e356f7c994affdb4855efc17f1ff4c6b97cdf35f1dd32e2a15aeba4336d7e' 
  AND token = 'ee9hxAIvL6dizH+EGhsK2CopocvTM2HeXXRkNJ61pTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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