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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e415228999b051171b854588ef1cfd2c3a3a4dd79ec63d97ce16a29233437fa' 
  AND token = 'EFRn9cx8hhsxK6sjc2jbjkM7EQ8JTIuhumZM5A36KAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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