SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '295ba67d5ea33013a179b60df55261db60696a95416193d577240815c286cd4e' 
  AND token = 'HVdwbtOizycPVDZ5x84BWgNqSwpme8MyzI9QGcnaJ+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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