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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '58bc9c2036da076b3b66f443f47a6c0a4d7bfe6f3595c533d2ca1c39df7a3b8f' 
  AND token = '7LYsr4nIOtkMLwJNfCq/sZWcKI5Rru8tDOatLDCok1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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