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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c01e3c744618cde95101549ba951269089d85dca26f768ae8a12c850f86323e2' 
  AND token = '8d9A6x6Wpamwr/Sx7GeorPUUEwWjrRO6A1e/jo/C8Cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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