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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd2263de1377174926bc992dd5a25776724e6a5e49409cade32529ee5c22de7dd' 
  AND token = 'faHgctDUjnZmp0ucKIzi9qYvb0Lo6fpZ0VCZSVueVRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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