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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7c7ce3410ca889223a99ec028fecd133f144e8c174141d55d679dde9674a9e5c' 
  AND token = '+q0P0LN07Ru9elkOzZQBYfhr3GOfukWMZbHwoTxIyzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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