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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e63bb2a2edf7c514b40e354b86072dc757f8a11d75c4a1bb034bbd31b001790c' 
  AND token = 'w5T9clcre5uiGDQzG0tmPt2a2GQBWNe3H7PAWDpbv5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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