Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5bcf995ef5da3cb9aca184ef95e27517fd4174c2a64cb02d764dc58660d2e1e' 
  AND token = 'E5ru1b5wnqp1CSJ+4bFmfOODh7L5ks9qZKQAFOIBJk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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