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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'ee314b34c6b622e905cfc4e957fa564ad9564a3a3342f4695789b980e3db53e4' 
  AND token = 'PiFdA/lp7sR18TdjUXhTkls0jei6BwyZTS8qTlb7Ews=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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