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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fced855b04b74914cefe2235f4d50207446f6e39b32ce3c92dee583c70d114b' 
  AND token = 'CnwPRx0v7r+p3gl6ozppmQwe5bzwYx9sEczKn8M93tM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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