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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '9eb941f20bb4a1d5b2cb61f64c7950759078ebfcc11e84cfe23f11b5aa19e931' 
  AND token = 'kP3HmyMg2WzmCzyIC5G2SwoDql2kxx7JoFPfzG4PXtk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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