Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ef3dbea2bed1149d08a4c5c5df731806036fb89cab00f64d664f85d4159f152' 
  AND token = 'QFigBkopD7ft5CTHMOapyeAGPDIrtHrpLH4xE7L6fG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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