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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '080240eb796fb4178d39d788edd08f5cd15cdeec7bd0576fc4252be3dcc7791b' 
  AND token = 'pQBsSTiRpiGG2laaBBPGH0bOZUZGUZjo+yp5a2X2fXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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