Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2b31a0bcd02b849f9163f9ac03bc9c5be58a51bfa011098d24dc4debc1ae73c9' 
  AND token = 'rLLX2uL9rwkwIMYZuDxvIrdB2biPjDZTbTGsSGSnh3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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