SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9c648045c5627d9ba413535e801e227579f104261a6021b9418e5342c0b5521c' 
  AND token = 'H0pfCGFpkAcKKTkqPfFKXMoFzjBRQvUkbRRJ/gdhF/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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