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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'fd7fc7bc255f1ea798bed7c0a59f056b452fbe50a44367225080c958b8396e1a' 
  AND token = 'YLtREi+cBaqn0GCiRJqcUeM+JG1yKP14pPhYa1b14y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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