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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'd52bf37d802137f14a22fdd14dbe32055817bc630710e9086db9ef469ac1ae3d' 
  AND token = 'PWHnQrfrRuKuqSDqWSrNpUSN6IsM+/XiW9sA3jxeOtg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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