SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f3ab07d516d7ec2a5107b6386d08fa956a64bfe9dc2e74e29f2e64f983961bc3' 
  AND token = 'SVF6N7yCEdBPqK50OwxERarhFt4sqMVZtxLgWJmy9FY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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