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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7c01ce23ac12e9ab64d804d9392b9d975ae019ec2aa1f439f1ee609082ba418b' 
  AND token = 'kNxTuhaJ8QeWBDzTuzazsPBi6EOp8HSMOdUnhp6Y9Iw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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