Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e584b361b766d61f8d1371e4c0fe215291d4f8396c67d9fbd3a415d45f47ac44' 
  AND token = 'mc2gz85b1MlQAGrseBoiw0l7nrV//EYoNcJA6p3lR7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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