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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60817bd522e19ae048ce73f95de806a7574a681aa873a767dfe51e6cbb2daf23' 
  AND token = 'mvisEWR8Oe3e/iba0p8f6ztX1kJfgrIH02Y8/oT6MKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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