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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c26b669af466ced7b533006a94cd26fac98937e2ae6e306e74268e02aa854eb5' 
  AND token = 'hTadD2Nj2lRSJ7ow159pKM4OMMUW4wipHeTRI3b6ppI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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