Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '842e0b6a909e8de7f965f9b159d19eb084d4413af691204976ac2a433d56ae91' 
  AND token = 'w77upEugdGS2GSk4ulMmXURgSJXYaAaOEqk/uP9mQag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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