Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d137d72da204e0806bcdc62e27d5761f1eba0c5ca7b73297400e7ad47002c50' 
  AND token = 'Cq6nfzT0IAQo8N+wGZlsiWyBeqtT/ZI0qrbXFvIANx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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