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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f809f16aab5d31cd3a464bdf156bc215aaa20a7fc1313feabed9b950b3edfdfa' 
  AND token = 'GFCkGcNNvgPMNGTawvVqVTf6H0yK9mRvxm+qHE0u1ro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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