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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc5b46f2eb0c54e7eb067b8658b4d74b13f60e04a6b2dbc3c5e6437f24baefa9' 
  AND token = 'VMxoiBO1vWcR9tyOP7GHBoiER0yc+D0awhrL61cdzuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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