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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '25efb96eaf9350af124f7b5a4a77e3db213d07bf2dc10b52ae5ce7949766134e' 
  AND token = 'K/XqsNL96/8ZFByWPEfCk6OfIFXoh7E18LsnW32zcZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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