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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f4fe7ce19c67b74b1682886d1259e82f98f51e6ac31b3a88be6f3cecdf6c3277' 
  AND token = 'MiD6gnp6wEfnDQowrZWmZoUHrVfZAF0/bsgHvpxsXn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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