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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac0bda9ae57507d66231317b8883230570c205cccf04b82f1d66ffd45b4f915f' 
  AND token = 'y9o4TdjdC5CF2JYS+nhde4bYBG4hVMdyJdKnbM2jaWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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