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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c093e2e8bb91e76eea5a5b6e6072d63d2fcdcc0f421d6f2a140dbc699a504772' 
  AND token = 'u088EZlDXrs+aK12gP0rR4AT7S2JI2HU5wam1Y0avIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}