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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'd075c1191f9c6fd20a6b3e5102a861376e064a7082902903cc45f1a2ab8cc006' 
  AND token = 'BVz8tak3yCD6dccr/PXqN+oe7IfX9XPAhWiEcHFxVQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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