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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01520f196ffe8960782feb1d9449b0e3c70500417effd4a0197f8e2fd58b69ee' 
  AND token = '0WS9WdNtoFE69IXVcFZCmxbwKiXXA3PTNRwhJB18v90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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