SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0111271a3b3a5998bc2990452f4cc99e9618712b25e8984a704f5521c66fe9a8' 
  AND token = 'I7j6Brbwp0J9oFpEgcJZhw3g//gkvrD6NQqt6dzIWrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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