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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'fb3553c44689438814e00f6eedc7898b01a552fd12ae9ac65c3e033197e3fdef' 
  AND token = '5hEO8wtC941tP2+0BDc3HHnoZ7pOwzLoqg8oZYPrX0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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