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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'a77a001801290d6c6bdadb2f8e56bfd91876a61a7ba98252c8d7273d4955549d' 
  AND token = '118w6hQ34729fFwSIHdvzVGQHUdy1xe4KxKd0qTVPkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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