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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd6e1cde95f2326289c463d16fe976227f9e1387c709312df3eeb11258a616919' 
  AND token = 'tVuIAC7B3NOBhOIDU4jqeTXvXo3Ldbz+mrU9KITScOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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