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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c28a59c2e5da236c772e6428542d6d3a01b44a46e04ae4c60e3cbb825e64f81' 
  AND token = 'QJgjxF4kjRT3P/HALhRoo8FETumpM80BxdEXoAfrU78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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