SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f050fa4ddaa625ec975a591fb30399edc219b809d8a90ed29df53c4807af8ea6' 
  AND token = 'Xwa42xU6ZcbAj/VldsCYg6hbk0J+oME+V6uoBwRQL0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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