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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'de94d0ee504c7b65208af2d9f3d70fcb60b269369cf261cda9b9a5d93d8749be' 
  AND token = 'wDAVU06GmRigjexjqu46coR9wY969ykVsd9HHwmsd+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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