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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24e95d1a8ce87a9b30a5622e70b621c9bd29223483343533405656ea40e1a47e' 
  AND token = 'ULRQocgeKM1Nk8YUKMPfQb2HvvxfUOo1CuHC7ztRN9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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