Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fec2df0318b6303022b6efc3a2422f6720783357cb9f49fea6797fc107c16387' 
  AND token = 'tJRC+M4iah3ViOqU0Ipa1tMrFrN/sn3tt7CPYSGTtCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}