Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9afbc4cc05455b029d6557247689bac5d43bf6e507a9cde6d612651f27b0e86' 
  AND token = 'JYR8ZC1oh/mwkeh0nTpVkj8Q0UnAQUq+p4Azs6a4NsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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