Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b4adebe2a427d7157d15139bee0b67332d82697da50e7ac640d3b24085047b24' 
  AND token = 'Y742V0+I4OuDyQryKc0yS94mc9/58OljagP4Y/Ss//0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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