Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6eb37819134cbfe6460cbd73201708001661019a091c6f40eb04e4083e2e6f06' 
  AND token = 'PzuFzcAbDmjZ2uuxv3116+yd0A2rWVbk6TkumBrKi1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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