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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '69586e6abb90b8cdc5af73c14c74e3a077eceb10bd6e5d8c1ac69317a8707ff4' 
  AND token = 'oSdA8heCXM6Bv236NSCQGSXYdMHYmhhmXRG84dkZ0mM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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