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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '1c67ba6ec6c9e06ece5b4f3afc4906b2cbd53cf9cbd4ea00bb9b09fe003499c0' 
  AND token = '76SwyTMS19xwhn6w72eXbievCnStmLVuqGwMP5Bu4cQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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