SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd86591a191f66b07e69da1f8bb70687e35afdab7f3013638d58d05235b416ec2' 
  AND token = 'wlz9Kw5YVgCWQubWqVLD/qLQJvGC/ndzdvQex9PNSu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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