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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '32da198c1e167d87b0c78b043d588ddf40acddb697f8df2df18e882db8b133c0' 
  AND token = 'XBcXJ/8sdhA4q0ujn7t8Noyk/NDteKbO128PZvdtCM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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