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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e095434c092dc5150e27e4a3ec2f0049154c104270092f21c86f60126d77eef0' 
  AND token = 'JP6cDcsbx/+bFlzBKDmN2zjY19mi6K3QhDDJnbnaOBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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